linux-ext4 - Re: mounting ext3 with another superblock doesn't work?

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Date:	Mon, 9 May 2011 14:43:22 +0200
From:	Rogier Wolff <R.E.Wolff@...Wizard.nl>
To:	Jan Kara <jack@...e.cz>
Cc:	Christoph Anton Mitterer <calestyo@...entia.net>,
	linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org,
	adilger@...ger.ca, amir73il@...rs.sourceforge.net
Subject: Re: mounting ext3 with another superblock doesn't work?

On Mon, May 09, 2011 at 02:06:08PM +0200, Jan Kara wrote:
> > e2fsprogs' mkfs is really missing a check whether any known
> > filesystem/partition type/container (luks, lvm, mdadm, etc.) is already on
> > device (and a -force switch),... IIRC xfsprogs already do this more or
> > less.

>   Yes, that would be reasonable although it might break some
>   people's scripts. But probably worth it anyway.

This is a difficult change.... 

Some GUI install things already perform this check and after asking
confirmation from the user will just execute:

	mkfs.ext3 /dev/....

and expect it to make the filesystem. 

So you could add an option: 
	--check _for_existing_filesystem

But then it is quite likely that people running it manually will
forget to add the option....

	Roger. 

-- 
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